What I mean by ignore is completely and utterly disregard him. Don't respond to any or his messages, even if it's supposedly to pass something on to someone else. If he truly appreciates what it was that your sister did, he could have told her himself and he knows that. He was just taking advantage of your kindness and using this as an excuse to continue arguing with you. That supposed appreciation was actually his bait.
Sigh* I tried that by blocking his ability to talk to me..He finally found a way around that. He messaged me from someone else account. I blocked that also. I just feel like its going to become a habit..I am going to deactivate my fb account for like a month.
I dont get it.